Fenolftalein 0,5 wt, % in ethanol: water (1:1), Sigma-Aldrich®
Leverantör: SIGMA-ALDRICH MICROSCOPY
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Varning
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Synonyms:
3,3-Bis(4-hydroxyphenyl)isobenzofuran-1(3H)-one
M-Clarity™ quality level = MQ200
Phenolphthalein is an acid base indicator. It is a weak acid, which is colorless in acidic solution and turns puce pink in alkaline solution. Phenolphthalein is genotoxic. It might cause oxidative damage and binds to estrogen receptors. Phenolphthalein solution is a synthetic indicator. It is colorless in acidic and neutral conditions. Phenolphthalein gives pink color when added to a base, therefore it is considered as a base indicator.
Phenolphthalein solution has been used to measure total titratable acids by titration method.
Formel:
C₂₀H₁₄O₄ MW: 318,33 g/mol Smältpunkt: –35 °C Densitet: 0,918 g/ml (25 °C) Flampunkt: 24 °C (closed cup) Storage Temperature: Room Temperature |
MDL Number:
MFCD00005913 CAS nummer: 77-09-8 EINECS: 201-004-7 UN: 1170 ADR: 3,III |
Specifikation testresultat
Appearance (Colour) | Colourless |
Appearance (Form) | Liquid |
Visual Interval pH 8.0 Colorless |
Pass |
Visual Interval pH 8.2 Pale Pink |
Pass |
Visual Interval pH 8.6 Pink |
Pass |
Visual Interval pH 10.0 Red |
Pass |
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